def read_file(filename):
	with open(filename, encoding='utf-8') as f:
		return f.read()

def write_file(filename, s):
	with open(filename, 'w', encoding='utf-8') as f:
		f.write(s)

def rm_hyphen_rf(path):
	import shutil
	try:
		shutil.rmtree(path)
	except FileNotFoundError:
		pass


def hash(x):
	from zlib import crc32
	return crc32(bytes(str(x), encoding='utf-8'))

def cool_hash(x):
	return hex(hash(x)).strip('0x')

def hash_dir(x, hash=hash):
    return { i: hash(x.__getattribute__(i)) for i in dir(x) }
		# if '_' not in i }


def get_time_str(fmt='%c'):
	import time
	return time.strftime(fmt)

def get_yyyymmdd_time_str():
	import time
	return get_time_str('%Y-%m-%d %H-%M-%S')


def json_dump(filename, a):
	import json
	dat = json.dumps(a, ensure_ascii=False, indent='\t')
		# so that json.decoder.JSONDecodeError won't damage the destination file
	with open(filename, 'w', encoding='utf-8') as f:
		f.write(dat)
		# json.dump(a, f, ensure_ascii=False, indent='\t')
		
dump_json = json_dump

def load_json(filename):
	import json
	with open(filename, encoding='utf-8') as f:
		return json.load(f)



def prepare_list(l):
	if isinstance(l, str):
		l = l.strip().split()
	return l

def pack_dict(self, lst):
	lst = prepare_list(lst)
	return { i: self.__dict__[i] for i in lst }

def load_helper(self, lst, loadfx):
	lst = prepare_list(lst)
	for i in lst: self.__dict__[i] = loadfx(i)


def current_path():
	import os.path
	return os.path.basename(os.getcwd())


def next_version(version_file='version.txt'):
	SEPARATOR = '\n'
	# style: 'x\nx\nx', without suffixes like 'b1', 'a2'
	version = read_file(version_file).strip().split(SEPARATOR)
	if len(version) != 3:
		raise TypeError(version)
	version = [ int(i) for i in version ]
	version[2] += 1
	write_file(version_file, SEPARATOR.join(map(str, version)))
	return '.'.join(map(str, version))

def pypi_setup(description, long_description_body, author='YAN Hui Hang, GDUFS', author_email='yanhuihang@126.com', github_prefix='https://gitee.com/yanhuihang/', install=False):
	import setuptools, sys, os
	package_name = current_path()
	long_description = f'''# {package_name}

{description}

Install with: `pip install {package_name}`

{long_description_body}'''
	write_file("README.md", long_description)

	# sys.argv.extend('sdist bdist_wheel'.split())
	sys.argv.append('bdist_wheel')

	rm_hyphen_rf('dist')

	setuptools.setup(
		name=package_name,
		version=next_version(),
		author=author,
		author_email=author_email,
		description=description,
		long_description=long_description,
		long_description_content_type="text/markdown",
		url=github_prefix + package_name,
		packages=setuptools.find_packages(),
		classifiers=[
			"Programming Language :: Python :: 3",
			# "License :: OSI Approved :: MIT License",
			"Operating System :: OS Independent",
		],
		python_requires='>=3.6',
		entry_points = {
			'console_scripts': [ f'{package_name}={package_name}:main' ],
		} if install else {}
	)

	os.system('python -m twine upload dist/*')



DEFAULT_SHELVE_FILENAME = 'shelve.out'
DEFAULT_ENV_VARIABLE_STOPWORDS = '__builtin__ __builtins__ exit get_ipython json np quit shelve time'.split() # __builtins__, my_shelf, modules, etc. can not be shelved.

def shelve_restore(globals, filename=DEFAULT_SHELVE_FILENAME): # call with globals()
	import shelve

	# WARNING: default open mode of shelve is not 'r', but 'c'
	# (read & write, create if not present)
	with shelve.open(filename, 'r') as my_shelf:
		for key in my_shelf:
			try:
				print("'{}'".format(key))
				globals[key] = my_shelf[key]
			except:
				print('ERROR shelving: {0}'.format(key))
				raise

# call with dir()
def save_shelve(dir, globals, filename=DEFAULT_SHELVE_FILENAME, stopwords=DEFAULT_ENV_VARIABLE_STOPWORDS):
	import shelve

	with shelve.open(filename, 'n') as my_shelf: # 'n' for new
		for key in dir:
			try:
				my_shelf[key] = globals[key]
				# print('Shelving {} success'.format(key))
			# except:
			except TypeError:
				if key not in stopwords:
					print('ERROR shelving: {0}'.format(key))
					
def suspend_file(path):
	import os
	suffix = '.' + get_yyyymmdd_time_str()
	path2 = path + suffix
	
	if os.path.exists(path2):
		suffix2 = cool_hash(path2)
		while True:
			path3 = path2 + '.' + suffix2
			if os.path.exists(path3):
				suffix2 = cool_hash(path3)
			else:
				path2 = path3
				break
	os.rename(path, path2)
	
	
def table(header, dat):
	from prettytable import PrettyTable
	x = PrettyTable()
	x.field_names = [ 'Index' ] + header
	c = 1
	for i in dat:
		x.add_row( [ c ] + i )
		c += 1
	return x